Mississippi government school teachers embroiled in test-taking fraud.

It was a brazen and surprisingly long-lived scheme, authorities said, to help aspiring public school teachers cheat on the tests they must pass to prove they are qualified to lead their classrooms.

For 15 years, teachers in three Southern states paid Clarence Mumford Sr. — himself a longtime educator — to send someone else to take the tests in their place, authorities said. Each time, Mumford received a fee of between $1,500 and $3,000 to send one of his test ringers with fake identification to the Praxis exam. In return, his customers got a passing grade and began their careers as cheaters, according to federal prosecutors in Memphis.

Authorities say the scheme affected hundreds — if not thousands — of public school students who ended up being taught by unqualified instructors.

Mumford faces more than 60 fraud and conspiracy charges that claim he created fake driver’s licenses with the information of a teacher or an aspiring teacher and attached the photograph of a test-taker. Prospective teachers are accused of giving Mumford their Social Security numbers for him to make the fake identities.

The hired-test takers went to testing centers, showed the proctor the fake license, and passed the certification exam, prosecutors say. Then, the aspiring teacher used the test score to secure a job with a public school district, the indictment alleges. Fourteen people have been charged with mail and Social Security fraud, and four people have pleaded guilty to charges associated with the scheme.

Mumford “obtained tens of thousands of dollars” during the alleged conspiracy, which prosecutors say lasted from 1995 to 2010 in Arkansas, Mississippi and Tennessee.